failure mode

FM-21: Sander mati berulang kali di bawah beban biasa

Alat berjalan tanpa beban tetapi berulang kali mati selama pengamplasan ringan normal.

Diagnostic overview

Alat berjalan tanpa beban tetapi berulang kali mati selama pengamplasan ringan normal.

Likely Root Causes

  • Battery protection opens under load
  • Contacts or battery are weak
  • Vents are blocked or tool is overheated
  • Pad/drive friction or controller fault

Quick Checks

  1. The sander runs continuously under ordinary light sanding load.

Repair Preview

  1. Set O, remove the battery, let both cool, and clear every external vent.
  2. Verifikasi gerakan bantalan bebas, cakram baru, tekanan ringan, dan jalur debu tidak terhalang.
  3. Ulangi tes singkat dengan battery yang terisi dan diketahui baik.
  4. Jika pemutusan kembali terjadi di bawah beban biasa, hentikan dan gunakan layanan resmi.

This is a preview of the troubleshooting guidance included in the full repair manual.

Common Fixes

  • Kontak terminal
  • Motor brushless motor dan kipas

Related symptoms

  • Sander mati berulang kali di bawah beban biasa

    Alat berjalan tanpa beban tetapi berulang kali mati selama pengamplasan ringan normal.

Included in the full manual

  • root cause analysis
  • tools needed
  • step-by-step repair procedure
  • diagrams
  • exploded views
  • post-repair checks

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.

FixBeforeBuy

Trusted repair guides, error codes, symptoms, and manuals before you replace your equipment.

Navigation

For technicians

Need the full step-by-step manual? Purchase securely on FixBeforeBuy and download your PDF after Stripe payment.

© 2026 FixBeforeBuy. Repair smarter before you buy.